Need help with SEO and Google

I have been doing a lot of SEO on my blog, and my home page has dropped off of google now. I had too many SEO plugins installed I think, and had Platinum SEO, All in one SEO, Headspace, and All In One Webmaster. I read online that I only want one of each so I went with Platinum SEO(more features imo), Headspace, and disabled the rest. My SEO plugins now are:

Clean SEO Slugs
Google XML Sitemaps
HeadSpace2
Keyword Statistics
Platinum SEO Pack
Robots Meta
SEO Friendly Images
SEO Smart Links

When I google J-Xile (my artist name) my Homepage (www.j-xile.com) used to be number one, and now it’s not on the rankings at all after doing my SEO. My Myspace is first, Facebook is second, and then about every other category and page of my blog OTHER than the main home page. When I click all results from J-Xile.com, my homepage is nowhere to be found, but 43 other pages/posts are there.

I read Yoats’s article on WordPress SEO and followed most of the tips. I went into all of the SEO plugins, an my pages and posts, and disabled all duplicate content (Author, Date, etc. archives), and no-followed/ no-indexed pages and posts I don’t want on Google (Login/Register, etc.). I also had gone through all of my pages and posts to add tags, titles, and meta descriptions and I know that it’s possible that that hurt my rankings, but I’m curious why my main page is no longer ranked.

Another note, I just went into the Sitemap plugin and made my homepage the only priority 1.0, and changed the setting so that priority it was not based by number of comments, but by my priorties (with hompage the only 1.0). I know that google takes a while to update it’s rankings, but I would really liked to know how to get my main homepage ranked number one again. Thanks for any help.